Rotary gas burner



Aug. 24, 1943. I E. L. DENNIS ROTARY GAS BURNER Filed Sept. 30, 1939 2 Sheets-Sheet l Aug. 24, 1943.

E. L. DENNIS ROTARY GAS BURNER Filed Sept. 30, 1959 2 SheetsSheet 2 Ed Z. 1767272 :5

. complete combustion,

' form of theinventionc Patented Auger 1943 Dennis, EeserveiLap l Aeneas September so;193's,.s rieinozssmeiI ma (ol'riss -iief 1 .fIhe present invention relates to a burner; for naturalgas or other gaseous fuel supplied under pressure, such as atomized-oil'mixed with steam.

In the copending application of Dennis, the present inventor, Serial No.- 38,045, filed June 29, 1936; for Rotary" gas burner, 'now Patent No.

air, but also'causes' ame'chanical mixture of the gas and air so complete as-toassure substantially instantaneous and complete combustion of the gas in the apparat'us'inwhich the" gasis burned. 'Wherejtherotation oi thegas dischargpressure he maintained at more than "a predeter-f mined minimum below whichthe pressure of the gas is not sufficient to assure a satisfactory rota- "Fig.;3is a fragmentary viewlof a device, show- 7 ing another modification;

Withsreference first to- Fig. 1,-the

cates at i'its inner or left; hand end, with the combustion space, not shown," 'of' a furnace or other apparatus in which the gaseous mix'turei's burned 'Air for combustion is admitted-at the outeror right hand end .of 1 the; casing; which" 11 may be-..provided,-'*as shown, with adraft regulator, comprising.fa stationary disk 3 h'e1d"t0 the f ca 'singf by"b0lts" l and a slide vB -overlyingthe disk i's'. ."Th'eslide has openings'e which may be moved more or less: int01a1inemer1t Jwith corresponding openings 1; in the disk. 3, the slidebeing ing and distributingdevice isdependentupon the :pressure of the: fuel-itself; it is essential that the held inzadjustedposition by a""locking nut '8.

' :JgJWithin the casing l: is positioned a Spidlrifiill which; is journalled on suitable. anti-friction'bearhand end; offthe shaft issecured a fan 1:3 which is" v aspartof thearotary element .The latter also tion'of the gas distributor Theprincipal object a of the inventionis to provide for arotation of the gas distributor from an external source, thereby making it "possible gto usefgas' for fuel "comprises-the gas-distributor: proper! having.

where the pressure on :the gas is only sufiicient torassure'j a discharge of gas through the nozzles of the gas distributor but not necessarily sufiih v 'webs FL. The shaft It extends to the right cientfto provide for arotation of the discharging device. '7 V In accordance with the present invention the the spider l, and'has mounted thereon a pulley rotary gas distributor which assuresa uniform distribution of the gas'over substantially the'entire cross-sectional area'of the air stream so that V the resultant flame a the gas and air burn is of uniform. intensity throughout isdriven by an external source of power which may be, for exam- 7 ple, an electric motor connected to the gas distributor or a fan associated with theidistributor anddriven by the passage of-air for combustion through the burner. 7 By the use of an external source oi'power for driving the gas distributor, the r'otation of the distributor isassured independently oi the gas pressure'thereby also assuring a thorough mixing of the gas and air for Other and. further vobjectsand advantages of tion with the accompanying drawings in which- Fig. 1 is a sectional .view

bodyingthe invention, v I Fig. 2 is a s'ectional view'through a modified throughv a device emingsf-ll .a'hollowshaft i2-.x on: the innerror left hollow apertured Tarms Ma; which is securedrto the hub:-of the fan .anditselfjhas a hollow hub V5 with which the hollow shaft lZcommunicatesg. A shaft 16 extends through thehollow shaft l2 and is secured thereto by radially extending beyond the end of a cap I8 which is secured to [9; This pulley is connected by a belt ,to a pulley 2| on a suitable driving motor22. By. this arrangement the fan l3 and gas distributor .14 are positively driven from the motor independently a of the discharge of gas from the distributor, and.

'thus rotation'of the distributor is assured even when the pressure on thegas entering the distributor, is so low that the reaction of the gas on v il) itself to' cause a rotation of the distributor and fan. Passages'i ic in the arms Ma communicate with the hollow hub of the distributor l4 and thereby direct gas to the openings Nib, gaseous the arms Ma of the distributoras it escapes.

through openings Mb thereinis not sufficient by fuel being supplied'to' the hollow hub, as will hereinafter appear. 7 j i Bythis arrangement itis possible to use gas at an extremely low,pressure with the rotation of the distributor providing for auniform andthorough distribution of the gas over the entire 7 I area of the passagethroughthe casing I and also a. thorough mixing fof the gas with air' forced through the casing by'ithe fan I73; This mixture ofgas andair is so complete asto assure almost casing! in Q r whichthe rotary distributor,-designated as a whole by 'the'num'eral 2, is mounted, communiiper fectfcom bustion of'the gas in the furnace,

positiyel-yar'otated -.b

zr completefmixture roftithef sga's and air andision a l uiiiformiidistiibution iofsthezigasioyer thecientire 1 crosse seotional areaztofcthe; aiitipassage in which .the; distributor; armssturni: Itliis'i'aisooposs'ible @rotated' in ziiespnns'eito and is controlled bythe number and spacing of the openings Mb as will be apparent.

' In some burner installations there is already available a blower or other means for supplying air to the furnace and in this event a structure of the type shown in Fig. 2 may be utilized. With reference to this figure, thecasing, not shown, has'its rotary member 2 mounted on the end of a hollow shaft-12C. 1 The latten is journalled in a spiders)Kconnected to. the casing.

The rotary member 2' consists of the distribe utor l' i having radially extending arms with "openings therein, as shown, similar to the distributor I4. Ifhe distributor is rotated-byarshaft 16f positioned within the.hollowshaftujzfimand secured thereto by radially extending webs I1.

i A motor, as in Fig. 1, drivesthisshazfirrtmough l suitable pulleys and belt and thus provides a posh tive rotation of. the gas distributor. Air, supplied fromxan :externalsourceirunder-i a .:low ;':pressurel e 't casing at heati hi?ih indzendftherebf 2 and;isxthoro-ughlyi'mixedi mithegasv.disoharging from'r'theiop rfln s:imthezdistribotore il soiiihat 1 theimixtureilofe gasiand airmnteringithe furnace =Wil1 be propensfonzcomplete combustion;

and? 2: thesgas dist'r-dbutorzis aip'ns'iftive driving; meanssfor wherezairzundenlslight pressurezimproyidectitrom an external sourcezito::haye theegasidistributor .thezzmovementpfiztheair.

" .{w past: the distributor. pi-Tozithiszhnde asgshowrr'in V Fig. 3, "arms ofi .theigas: distrihifiioral 4' E sa-reprovided -withiintegral fan blades '23aunon'swhich 4 -a'ir.- passing--thrmigh:istheieeasingz iialnipinges UOPGELUSQiS rotation of: 'theiitlistribntor. 2111112 61115 I J11 arrangement the; distributonilfi;'eisssuppontedion L1 ably: supportedzgcentral lyebf asscasingasimilanzto 'thatz'hfl Fig. .1. IiEaI]l b1adES.- 2 iii-ares positionedi'on heitdistributoril'd'fzsbomhtain the: desired rota- 4 1 2,327,512 1;; tion of the distributor, dependent upon the ref e Y J I of air travel through the casing,

It will beunderstood that gas isi directed toi the distributor M through an inlet 24 in the I I 5 cap I8, Fig. 1, and through the'hollow shaft i2.

Suitable seals or gaskets'prevent escape ofthe The shaft i2 cominuni 1 7 h 1 cates with the hollow hub of the distributor'andf I gas intothe bearings.

the channels or passages lfic'in the armsdirec' 't 1 .thegaseous-fuel to the discl arge,openingsltbLi" -as shown I Fro-mlthe foregoing tation of the gas distributorwhen the gas pres- -*su;re-is"-not sufiicientto assurearotation of the .Qdistributor by the reaction of the discharge of the gas through the openin s in therotary member. 1 sfllhus sinr-Eigss laand 2, the positiverotatiqn is p-rovided'by anlelectric motor or other suitable 20 source which drives'the gas distributor; in Fig.

talisman sidistnhutor. lzglaim, i

time ibnrn li ion: aseou ri e ie'a-hqllnwr:cmin Worm. din axpassaeeaior "air as ider in saidg'g s e in zhaiiinaa stationary-Mlle!, ubi al ollow shaft 'rziQ lm l l d;in aidhuband xtendinggbeyond the p .CfiSipg; aillOllow gas ,1

tithe; exteniiedzen illi1 1i11:19W he attenzandithenebyidriive said: gasidistributor.

it will apparent. A the. present invention'provides for a positiveroe heated p vides iorethe j mmunieatingykthere dad-istributins; device..zpr widingigaseis.

:HWit v e ginglapeigtures; xtend ng'across. siihstantially tireeeotive ar-i1 

